Rock Island 51416MA | M1911-A1 GI | .45 ACP | 3.5″ Barrel

The Rock Island (Armscor) 51416MA is a Massachusetts‑compliant M1911-A1 GI pattern pistol chambered in .45 ACP with a 3.50″ barrel and a 7+1 capacity. It uses a steel frame and slide with a black parkerized finish, a beavertail safety, serrated slide, and smooth wood grips—built to the classic GI profile for a compact carry and familiar controls. For a compact 1911 like this, a micro red dot such as the Holosun HS507K pairs well and remains under $1,000.

Product Specifications

• The manufacturer is listed as Armscor / Rock Island Armory.
• The ATF Model is M1911 A1 GI.
• The part number is 51416MA.
• The caliber is .45 ACP.
• The capacity is 7+1.
• The action is Single Action.
• The barrel length is 3.50″.
• The overall length has multiple reported values; see notes.
• The frame material is Steel.
• The finish is Black Parkerized.
• The grips are Smooth Wood.
• The sights are Fixed GI Style.
• The safety is listed as Beavertail.
• The slide description is Serrated.
• The UPC is 4806015515036.

This compact M1911 preserves the classic silhouette and controls with modern manufacturing and a black parkerized finish that reduces reflections. The 3.50″ barrel and GI-style fixed sights keep the profile trim for carry while still providing the sight radius and barrel length balance typical of compact 1911s. The wood grips and beavertail safety deliver the traditional feel for shooters who prefer the original 1911 ergonomics.

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